单项选择题
In this game, he was an amateur, not an expert, and thus, for the first time, became a ______ instead of a man of action.
单项选择题 Richard was his father's only ______, as he had no brothers or sisters.
单项选择题 The World Health Organization fights against ______ diseases all over the world.
单项选择题 Too much information can only ______ people and they don't know what to do with it.
